Electric-light fixture.



G. MARX. ELEcTmc LIGHT Pumas. APPLICA-T|0N FILED vDEC. 12. 1914.

1 ,23.8, 549, -I Patented Aug. 28, 1917.

l2 SHEETS-gain 1.

Snowdon l i I (I/ f l ttoamm G. MARX.

ELECTRIC LIGHTHXTURE. APPucATloN msu nsc.12. |914.

l1,238,549. Patented Aug. 28.1917.

A:1. SHEETS-SHEET 2..

Appueeuen ima Deeeneer 1a, 1914. fseiii'einevegsoe; i

TQ all '107mm "it 'Way concern Be it known 'that LG'UsTAVUs MARX, a citiy een of the United States, residing et Pew- `nee, in the Ecoitm'ty of Pawnee and State '0f Oklahoma', h'afv'e invented neWfaiid useful Improvements Electric-Light Fixtures, 'o `Wli'icli the olloWi-n'g is a specication This in'venti'on relates vtol'ig'ht fixtures and more particularly to 'electric -drop lights. The prineipal object 'of the invention 1s 'to provide a xtuie constructed in 'such manner that use lights may be rei-sed er lewered se ,as to be Held in any 'adjusted position,'there by "byiating the use f flexible cords Y on table lamps and like Vdevices and combining in one device 'a ceiling fixture vand drop` li ht.

gAnotherv objectA of the invention is to provide an electricldiop light in Vwhich the 'continuity "of the electrical conductors is uninterrupted and maintained in such conditin independently jef the adjustment of the lights relative to the ceiling.'

Further obl'ects of the invention will appear as therfollowing description is read connection with the accompanying drawings', which forni a part of this application 'and `in which Figure 1 `is an elevation 'showin-g the de- "viiceattched to the ceiling. p

i Fig'. Q is a vertical sectional View taken yon the line 9-"2 of Fig. 4.

' is a r'similar sectional `View taken at fight angles to Fig. 2. i

Fig. 4 is a horizontal sectional View taken eil the line 21e-4 of Fig. '2;

Fig. l5 is a similar sectional the line 5-"-5 'of Fig'. '2;

Fig. 6 is a top plan yieW o'f the device removed from the ceiling;

Fig. 7 is a detail perspectiye ifiew of one of the ,locking dogs. y l

In the specific embodiment f theinxeg tion, as illustrated herein, 1 and 2 represent the separate sections of the casing which may be, as Will be readily understood, of any .suitable sectional outline and which are shown to be substantially rectangular with the' diagonally opposite corners of the section 1 cut away to pass the locking plates 3 View taken on arranged in diagonally opposite corners of the section 2 and having apertures 3 arranged at intervals therein. The section 1 telescopes With the section 2 and, as shown, carries the lightfsupporting arms 4, two only of which have been shown herein. These Tightesuppertinfg arms carry the eieuit `wires s and e eea haves-unable aippies 7 se which the lamp 'socletsaii'd globes ay be conuected.- Y 'i f Secured inthe bottoni of the tubul'arweasin '1 iscajielfoelr` 'of insulation '8 having chan- Ine-s '9 therein-for the passage of the Wires fandu'. 'Ilhese' 'blocks 'are "also 'provided with sockets 10 'adapted to 'r'ecei'fe' the 'reeftangular headsvll fof the lguiding tubes .12.

`l'fllese guiding tubesy extend 'throughout elle length off -the lower section 1 ofy the casing mld are pr'evi'dedpun their upper ends with external l(':ollfaifs13, 'the function of which will be hereinafter "described, The

wine-ii vfits ythe artes 12 and 1deins.` against pilates, as shown', arefprovided with apertures 125 Whieh leglister with the channels 9 sofas to 'vvires.`

. Mounted `in ltlie u p'er'eid 'of xthe upper sec; tion is a block preferably {Ofinsulated maternita-eng apertures 17 .running therep'ernitepassage 'of the conductor thi-eughin speeedrelatien and 'else previded with ,seeketsis 'wliieh 'the caps 19 fare gie-needs. These 'eaps have threaded therein-'t the redsfao whiehiiere e length 'equal te the s'ejcti'e'iif zand are adapted te telesepeinte die messia-lf Thefeepsare held against re1- tatiou byhafvinga xlateral'J V21 which yengagesA in re'eesses' formed in theu wells fef the Vseekers `'is slid treheid age-inst verdeel "ie'd iipbn the plate 22.' lAfter passing through the caps 19, the Wires are Wound around the guide rods 20 in spiral form and pass throughthe collars 13 on the upper end of the tube 19. Where they pass directlyV down along side of the tube and are secured in any suitable manner to the lower ends thereof. The conductor Wires' are preferably insulated in the usual manner but if the tubes and rods are properly insulated one from the other, it may be found desirable to use uninsulated or bare conductors.

Threaded into the caps 19 are tubes 26 'les vactuating rod 33. centrally through the lower section 1 of the which surround and are spaced from the guiding rods 20 so as to permit the contrae'-k tion and expansion ofthe coils'of thecon` are guided in their movements by the co1- lar 13. The tubes 26 are employed to con- `ine the coils of the conductor wires 5 and 6, which rest upon the collars 13 and upon the caps 19 when in contracted position and fit closely around therod 20 when in extended position, the tubes 26 being of: suicient diameter to accommodate the trans verse expansion of the coils when contracted.

Extending across the cut 'olf corners of the lower section 1 are axles 27 and 28 which are arranged in parallelism-and in the same plane and vhave .journaled thereonthe locking dogs 29beveled upon their outer facev as shown atv30 provided with a slot 31 in the inner end to receive vthe cross pin 32 bridging the bifurcation in thefupper end of the This rod passes down casing and has bearingin the block 8 and plate 141, the former serving as an abutment for a spiral spring 34 which surrounds the rod and normally holds the same depressed and the locking dogs extended, the lower end of the spring bearing upon an actuating bar or head 35,' which is threaded upon the lower end of the rod and passesthrough the lfinishing cap 36. The upper end of the rod 33 is guided in its movement by a spider' 37 extending across the upper section and having a' central eye 38 formed therein. The upward movement of the rod V33 is limited by the extent'of contraction of the spring 34, while itsdownward movement is limited by a collar 39 secured to the rod and arranged to engage onthe upper side of the plate. v14. The upwardv movement of the lower section l is limited b the extent of contraction of the coils o the conductorvwires 5 and 6, while the downward movement is limited by a stop 4,0 arranged in one of the tubes 26 and adapted to contact with the under side lof itsrasso ciated collar 13. T

y.In the operation of the device it will of Jopiesi of this patent may be obtainedifr course be understood that the dogs 29 engagewithin the apertures 3a of the locking plates 3 and when it is desired to lower the section 1, ythe rod 33 is pushed upwardly against the tension of the -spring 34 so as to release the dogs from these apertures. The section 1 may then be pulled downwardly to any desired degree and upon release of the rod 33 the dogs will engage in the next lower aperture and will lock the section 1 against further downward movement. The section 1 can be raised without manipulat-V ing the rod 33 as the inclined face 30 on the dogs will act as acam which will ride over 'the end walls ofr the apertures 3a and raise the rod 33 against the tensionk of therspring 34. In elevating the section 1 within the section 2, the collars 13 force'the conducrods-20 being guided within the tubes 12 and the tubes 12 being guided within the tubes 26. Internal shoulders are preferably provided adjacentthe ends of each` lsection so as to limit the inward movement of the plate 14 and block 16. f VVhatis claimed is:

A light fixture comprising a casing composed of two slidably connected sections, the outer yof which having a plurality of longi* tudinally arranged apertures, a block of insulation mounted in each section, a pair of tubes telescoping with each other and supported respectively by the blocks of insulation, an electric conductor housed within the tubes, a pair of slotted dogs pivotally supported by the inner section and adapted to engage said apertures, a rod having aportion mounted in the slots of said dogs and havingfone end projecting exteriorly of one of said sections, said projecting end being enlarged, and a coil spring encircling said rod and abutting the block'in the inner section and said enlarged end.

In testimony whereof I affix my signature in presence of two witnesses.

GUSTAVUS- MARX. lWitnesses vc cents each, by addressing the ummssioner of Patents,

Washington, D. C. p L 

